Shift knob



FIG. 1 is a front view of shift knob showing my new design (in symmetry of the rear view) (in symmetry of the left side view) (in symmetry of the right side view);

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a perspective view thereof. 

The ornamental design for a shift knob, as shown and described. 